Strange behaviour.....

[Professor Peach]

The dash warned me of a failed bulb this morning, upon inspection turned out to be offside brake light. While investigating that though, I noticed one of the rear number plate bulbs flashing, so assumed it too was on its way out. Strange thing though, when I replaced the brake bulb, the number plate bulb stopped flashing.
so..... Coincidence, strange connected gremlins you all know about, or do I need a priest for an exorcism ?